Ruin a band's name with just one letter.

NapaAddick said:

Kiss = Piss
Queen = Queer

I reckon I'd have worked those 2 out

Bong Jovi

cafcfan said:

Musty Springfield

or as she was known in my time Rusty Springboard

The Housefartins

Dumpy's Crusty Nuts

The Poxies
The Bleeders

Adam and the Pants

T. Sex

Modern Bromance

(Everybody Salsa was playing in a shop I went into (and came out of very quickly) last week. It led me to google Modern Romance for the benefit of Little Miss Idle who is lucky enough to have been born 14 years too late to have suffered this rubbish, and I realised Ay Ay Ay Ay Moosey was also by them. But singing it back, they appear to be exactly the same tune)

Lack Sabbath